Work makeup tip: DON’T do fake lashes in the office.

Now don’t get us wrong—we love all things lash-related—but save the faux lashes for Saturday night. Can you imagine if a few fell off midmeeting? Or if you had a glue malfunction to manage during a conference call? Falsies and photocopies just don’t mix.

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Work makeup tip: DO go easy on the mascara.

Can’t you picture Joy Bryant—who’s got lashes that are noticeable but not totally in your face—running a big office meeting, with no problemo? To avoid the overdone eye makeup look, Kimberly Soane, director of artistry for Bobbi Brown, says “roll the wand as you apply the mascara from base to tip.” This will separate your lashes as it lengthens.

Photo: FilmMagic

Work makeup tip: DON’T fake-bake or test-drive any complexion-changing beauty product on weekdays.

There is a fine line between bronzed and burnt orange, and it’s not one we recommend crossing at the office unless you want to be known as “that pumpkin girl” among colleagues. Leave the beauty experiments with bleaches, self-tanners and the like for the weekend, in case something goes amiss.

Photo: WireImage

Work makeup tip: DO master the pretty faux-glow makeup look.

How dewy and perfect does AnnaLynne McCord look here? She’s exuding total take-charge vibes. Benefit makeup pro Annie Ford Danielson swears that the key to making bronzer look natural is “blending…into your hairline and down to your décolleté.” Another sneaky trick? Apply a matte bronzer like Benefit’s Hoola with a large makeup brush, for a polished, office-appropriate finish.

Photo: WireImage

Work makeup tip: DON’T do the frosted or (gasp!) glittery lip thing.

There are too many pretty pinks and nude lipsticks out there to go the frosted, chalky route. This kind of lip color does nothing but wash out your face, and it can look a little young—not to mention distracting—in a professional setting. Skip it.

Jessica Biel is sporting a downright dreamy nudish-pink lip color. While she’s shown wearing it at night, this is a great option for the workday (even if yours starts in the wee morning hours). It’ll subtly perk up your entire face but won’t leave those yucky rims on your coffee cup or seem too loud for a 9 A.M. meeting. For a similar shade, try L’Oréal Colour Juice Sheer Juicy Lip Gloss in Bubble Gum.

Photo: WireImage

Work makeup tip: DON’T OD on dark eye makeup.

The last place you need to get heavy-handed is the eyes, especially from 9 to 5. Not only is the smoky, raccoon eye look unflattering, but your bosses might wonder if it’s leftover from the evening before.

Photo: FilmMagic

Work makeup tip: DO add polish to your beauty look with a little (faux!) liner.

Stila makeup pro Viviana Martin let us in on a little eyeliner secret: Eyeliner itself isn’t always necessary! She explained that a clean liner look can be just as easily achieved by “spraying a shadow brush with water and dipping it into a black eyeshadow.” That way, you can get the control of a liner while keeping the flattering, natural shade of your favorite eyeshadow. For a look like Emma Watson’s, just be sure to use a thin brush!

Photo: WireImage

Work makeup tip: DON’T fixate on embellishing up to your eyebrows.

This is a tough beauty look to pull off on the red carpet, let alone an office with unflattering fluorescent lights. Going up to the brow line with your eye makeup isn’t going to do you any favors, and it might seem over-the-top to your superiors and clients.